tree db564e5da4244025afc24e966166e59009f941b3
parent f1fdc848aab7fb95b32e058b7f06cc07912b3734
author Yingping Lu <yingping@sgi.com> 1142991875 +1100
committer Nathan Scott <nathans@sgi.com> 1142991875 +1100

[XFS] Fixing the error caused by the conflict between DIO Write's
conversion and concurrent truncate operations. Use vn_iowait to wait for
the completion of any pending DIOs. Since the truncate requires exclusive
IOLOCK, so this blocks any further DIO operations since DIO write also
needs exclusive IOBLOCK. This serves as a barrier and prevent any
potential starvation.

SGI-PV: 947420
SGI-Modid: xfs-linux-melb:xfs-kern:208088a

Signed-off-by: Yingping Lu <yingping@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>